/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jclouds.oauth.v2;

import static com.google.common.base.Preconditions.checkNotNull;
import static com.google.common.base.Throwables.propagate;
import static org.jclouds.oauth.v2.config.OAuthProperties.AUDIENCE;
import static org.jclouds.util.Strings2.toStringAndClose;

import java.io.File;
import java.io.IOException;
import java.util.Properties;

import org.jclouds.oauth.v2.config.CredentialType;
import org.jclouds.oauth.v2.config.OAuthProperties;

import com.google.common.base.Charsets;
import com.google.common.io.Files;

public class OAuthTestUtils {

   public static Properties defaultProperties(Properties properties) {
      try {
         properties = properties == null ? new Properties() : properties;
         properties.put("oauth.identity", "foo");
         properties.put("oauth.credential", toStringAndClose(OAuthTestUtils.class.getResourceAsStream("/testpk.pem")));
         properties.put("oauth.endpoint", "http://localhost:5000/o/oauth2/token");
         properties.put(AUDIENCE, "https://accounts.google.com/o/oauth2/token");
         return properties;
      } catch (IOException e) {
         throw propagate(e);
      }
   }

   public static Properties bearerTokenAuthProperties(Properties properties) {
      properties = properties == null ? new Properties() : properties;
      properties.put("oauth.identity", "761326798069-r5mljlln1rd4lrbhg75efgigp36m78j5@developer.gserviceaccount.com");
      properties.put("oauth.credential", "1/8xbJqaOZXSUZbHLl5EOtu1pxz3fmmetKx9W8CV4t79M");
      properties.put("oauth.endpoint", "http://localhost:5000/o/oauth2/token");
      properties.put(AUDIENCE, "https://accounts.google.com/o/oauth2/token");
      properties.put(OAuthProperties.CREDENTIAL_TYPE, CredentialType.BEARER_TOKEN_CREDENTIALS.toString());
      return properties;
   }

   public static String setCredential(Properties overrides, String key) {
      String val = null;
      String credentialFromFile = null;
      String testKey = "test." + key;

      if (System.getProperties().containsKey(testKey)) {
         val = System.getProperty(testKey);
      }
      checkNotNull(val, String.format("the property %s must be set (pem private key file path or private key as a string)", testKey));

      if (val.startsWith("-----BEGIN")) {
         return val;
      }

      try {
         credentialFromFile = Files.toString(new File(val), Charsets.UTF_8);
      } catch (IOException e) {
         throw propagate(e);
      }
      overrides.setProperty(key, credentialFromFile);
      return credentialFromFile;
   }

   public static String getMandatoryProperty(Properties properties, String key) {
      checkNotNull(properties);
      checkNotNull(key);
      String value = properties.getProperty(key);
      return checkNotNull(value, String.format("mandatory property %s or test.%s was not present", key, key));
   }

}